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-rw-r--r--arch/x86/boot/genimage.sh272
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diff --git a/arch/x86/boot/genimage.sh b/arch/x86/boot/genimage.sh
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+#!/bin/bash
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2017 by Changbin Du <changbin.du@intel.com>
+#
+# Adapted from code in arch/x86/boot/Makefile by H. Peter Anvin and others
+#
+# "make fdimage/fdimage144/fdimage288/hdimage/isoimage"
+# script for x86 architecture
+#
+# Arguments:
+# $1 - fdimage format
+# $2 - target image file
+# $3 - kernel bzImage file
+# $4 - mtools configuration file
+# $5 - kernel cmdline
+# $6+ - initrd image file(s)
+#
+# This script requires:
+# bash
+# syslinux
+# mtools (for fdimage* and hdimage)
+# edk2/OVMF (for hdimage)
+#
+# Otherwise try to stick to POSIX shell commands...
+#
+
+# Use "make V=1" to debug this script
+case "${KBUILD_VERBOSE}" in
+*1*)
+ set -x
+ ;;
+esac
+
+# Exit the top-level shell with an error
+topshell=$$
+trap 'exit 1' USR1
+die() {
+ echo "" 1>&2
+ echo " *** $*" 1>&2
+ echo "" 1>&2
+ kill -USR1 $topshell
+}
+
+# Verify the existence and readability of a file
+verify() {
+ if [ ! -f "$1" -o ! -r "$1" ]; then
+ die "Missing file: $1"
+ fi
+}
+
+diskfmt="$1"
+FIMAGE="$2"
+FBZIMAGE="$3"
+MTOOLSRC="$4"
+KCMDLINE="$5"
+shift 5 # Remaining arguments = initrd files
+
+export MTOOLSRC
+
+# common options for dd
+dd='dd iflag=fullblock'
+
+# Make sure the files actually exist
+verify "$FBZIMAGE"
+
+declare -a FDINITRDS
+irdpfx=' initrd='
+initrdopts_syslinux=''
+initrdopts_efi=''
+for f in "$@"; do
+ if [ -f "$f" -a -r "$f" ]; then
+ FDINITRDS=("${FDINITRDS[@]}" "$f")
+ fname="$(basename "$f")"
+ initrdopts_syslinux="${initrdopts_syslinux}${irdpfx}${fname}"
+ irdpfx=,
+ initrdopts_efi="${initrdopts_efi} initrd=${fname}"
+ fi
+done
+
+# Read a $3-byte littleendian unsigned value at offset $2 from file $1
+le() {
+ local n=0
+ local m=1
+ for b in $(od -A n -v -j $2 -N $3 -t u1 "$1"); do
+ n=$((n + b*m))
+ m=$((m * 256))
+ done
+ echo $n
+}
+
+# Get the EFI architecture name such that boot{name}.efi is the default
+# boot file name. Returns false with no output if the file is not an
+# EFI image or otherwise unknown.
+efiarch() {
+ [ -f "$1" ] || return
+ [ $(le "$1" 0 2) -eq 23117 ] || return # MZ magic
+ peoffs=$(le "$1" 60 4) # PE header offset
+ [ $peoffs -ge 64 ] || return
+ [ $(le "$1" $peoffs 4) -eq 17744 ] || return # PE magic
+ case $(le "$1" $((peoffs+4+20)) 2) in # PE type
+ 267) ;; # PE32
+ 523) ;; # PE32+
+ *) return 1 ;; # Invalid
+ esac
+ [ $(le "$1" $((peoffs+4+20+68)) 2) -eq 10 ] || return # EFI app
+ case $(le "$1" $((peoffs+4)) 2) in # Machine type
+ 332) echo i386 ;;
+ 450) echo arm ;;
+ 512) echo ia64 ;;
+ 20530) echo riscv32 ;;
+ 20580) echo riscv64 ;;
+ 20776) echo riscv128 ;;
+ 34404) echo x64 ;;
+ 43620) echo aa64 ;;
+ esac
+}
+
+# Get the combined sizes in bytes of the files given, counting sparse
+# files as full length, and padding each file to cluster size
+cluster=16384
+filesizes() {
+ local t=0
+ local s
+ for s in $(ls -lnL "$@" 2>/dev/null | awk '/^-/{ print $5; }'); do
+ t=$((t + ((s+cluster-1)/cluster)*cluster))
+ done
+ echo $t
+}
+
+# Expand directory names which should be in /usr/share into a list
+# of possible alternatives
+sharedirs() {
+ local dir file
+ for dir in /usr/share /usr/lib64 /usr/lib; do
+ for file; do
+ echo "$dir/$file"
+ echo "$dir/${file^^}"
+ done
+ done
+}
+efidirs() {
+ local dir file
+ for dir in /usr/share /boot /usr/lib64 /usr/lib; do
+ for file; do
+ echo "$dir/$file"
+ echo "$dir/${file^^}"
+ done
+ done
+}
+
+findsyslinux() {
+ local f="$(find -L $(sharedirs syslinux isolinux) \
+ -name "$1" -readable -type f -print -quit 2>/dev/null)"
+ if [ ! -f "$f" ]; then
+ die "Need a $1 file, please install syslinux/isolinux."
+ fi
+ echo "$f"
+ return 0
+}
+
+findovmf() {
+ local arch="$1"
+ shift
+ local -a names=(-false)
+ local name f
+ for name; do
+ names=("${names[@]}" -or -iname "$name")
+ done
+ for f in $(find -L $(efidirs edk2 ovmf) \
+ \( "${names[@]}" \) -readable -type f \
+ -print 2>/dev/null); do
+ if [ "$(efiarch "$f")" = "$arch" ]; then
+ echo "$f"
+ return 0
+ fi
+ done
+ die "Need a $1 file for $arch, please install EDK2/OVMF."
+}
+
+do_mcopy() {
+ if [ ${#FDINITRDS[@]} -gt 0 ]; then
+ mcopy "${FDINITRDS[@]}" "$1"
+ fi
+ if [ -n "$efishell" ]; then
+ mmd "$1"EFI "$1"EFI/Boot
+ mcopy "$efishell" "$1"EFI/Boot/boot${kefiarch}.efi
+ fi
+ if [ -n "$kefiarch" ]; then
+ echo linux "$KCMDLINE$initrdopts_efi" | \
+ mcopy - "$1"startup.nsh
+ fi
+ echo default linux "$KCMDLINE$initrdopts_syslinux" | \
+ mcopy - "$1"syslinux.cfg
+ mcopy "$FBZIMAGE" "$1"linux
+}
+
+genbzdisk() {
+ verify "$MTOOLSRC"
+ mformat -v 'LINUX_BOOT' a:
+ syslinux "$FIMAGE"
+ do_mcopy a:
+}
+
+genfdimage144() {
+ verify "$MTOOLSRC"
+ $dd if=/dev/zero of="$FIMAGE" bs=1024 count=1440 2>/dev/null
+ mformat -v 'LINUX_BOOT' v:
+ syslinux "$FIMAGE"
+ do_mcopy v:
+}
+
+genfdimage288() {
+ verify "$MTOOLSRC"
+ $dd if=/dev/zero of="$FIMAGE" bs=1024 count=2880 2>/dev/null
+ mformat -v 'LINUX_BOOT' w:
+ syslinux "$FIMAGE"
+ do_mcopy w:
+}
+
+genhdimage() {
+ verify "$MTOOLSRC"
+ mbr="$(findsyslinux mbr.bin)"
+ kefiarch="$(efiarch "$FBZIMAGE")"
+ if [ -n "$kefiarch" ]; then
+ # The efishell provides command line handling
+ efishell="$(findovmf $kefiarch shell.efi shell${kefiarch}.efi)"
+ ptype='-T 0xef' # EFI system partition, no GPT
+ fi
+ sizes=$(filesizes "$FBZIMAGE" "${FDINITRDS[@]}" "$efishell")
+ # Allow 1% + 2 MiB for filesystem and partition table overhead,
+ # syslinux, and config files; this is probably excessive...
+ megs=$(((sizes + sizes/100 + 2*1024*1024 - 1)/(1024*1024)))
+ $dd if=/dev/zero of="$FIMAGE" bs=$((1024*1024)) count=$megs 2>/dev/null
+ mpartition -I -c -s 32 -h 64 $ptype -b 64 -a p:
+ $dd if="$mbr" of="$FIMAGE" bs=440 count=1 conv=notrunc 2>/dev/null
+ mformat -v 'LINUX_BOOT' -s 32 -h 64 -c $((cluster/512)) -t $megs h:
+ syslinux --offset $((64*512)) "$FIMAGE"
+ do_mcopy h:
+}
+
+geniso() {
+ tmp_dir="$(dirname "$FIMAGE")/isoimage"
+ rm -rf "$tmp_dir"
+ mkdir "$tmp_dir"
+ isolinux=$(findsyslinux isolinux.bin)
+ ldlinux=$(findsyslinux ldlinux.c32)
+ cp "$isolinux" "$ldlinux" "$tmp_dir"
+ cp "$FBZIMAGE" "$tmp_dir"/linux
+ echo default linux "$KCMDLINE" > "$tmp_dir"/isolinux.cfg
+ cp "${FDINITRDS[@]}" "$tmp_dir"/
+ genisoimage -J -r -appid 'LINUX_BOOT' -input-charset=utf-8 \
+ -quiet -o "$FIMAGE" -b isolinux.bin \
+ -c boot.cat -no-emul-boot -boot-load-size 4 \
+ -boot-info-table "$tmp_dir"
+ isohybrid "$FIMAGE" 2>/dev/null || true
+ rm -rf "$tmp_dir"
+}
+
+rm -f "$FIMAGE"
+
+case "$diskfmt" in
+ bzdisk) genbzdisk;;
+ fdimage144) genfdimage144;;
+ fdimage288) genfdimage288;;
+ hdimage) genhdimage;;
+ isoimage) geniso;;
+ *) die "Unknown image format: $diskfmt";;
+esac